Seoul: Samsung Electronics Friday forecast a record operating profit of 17.5 trillion won ($15.4 billion) in the third quarter led by solid demand for its memory chips.

Sales for July to September are expected to reach 65 trillion won, the world's largest maker of smartphones and memory chips said in a regulatory filing.

The earnings forecast from the South Korean electronics giant beat market consensus of about 17.2 trillion won according to market researcher FnGuide, with analysts expecting a jump in profits on a strong performance by the company's semiconductor unit.

Third-quarter operating profit was up 20.4 per cent from a year ago while sales jumped by 4.7 per cent.

"Operating profit seems to be at its peak now," Greg Roh, an analyst at Hyundai Motor Securities, told Bloomberg News.

"Early next year might be the right time to buy Samsung before growth picks up again in the bottom half of next year," he added.

Samsung shares rose as much as 1.8 per cent in early trading in Seoul. Samsung withholds net profit and sector-by-sector business performance until it releases its final earnings report, which is expected later this month.

The South Korean tech giant has seen profits soar in recent years largely thanks to solid demand for memory chips for mobile devices which has helped offset weakening profits from its own mobile production.

Samsung's chipmaking unit — currently dominating the global market after the firm invested tens of billions of dollars each year to build and expand factories -- provides chips for its own devices as well as those of competitors including Apple.

But there are growing concerns over declining chip prices.

The price of DRAM products — used in mobile devices, servers and PCs — is expected to see a sharp drop of five percent in the fourth quarter from the previous quarter on slowing demand, said TrendForce, a market research firm that tracks memory chip pricing.

"DRAM products have begun to see a weak price trend since 3Q18 after the price growth of nine consecutive quarters," said Avril Wu, a senior research director at DRAMeXchange, a unit of TrendForce.

Samsung plans to introduce cutting-edge features to its mid-priced Galaxy A series to attract "millennials who cannot afford the flagship", its mobile division CEO DJ Koh said during an interview with CNBC last month.

Koh added that Samsung was close to concluding the development of a foldable smartphone and would be ready to unveil it this year.

The firm unveiled its latest Galaxy Note 9 model in August and is due to launch a new line up of mobile devices under its Galaxy line next week, fuelling speculation over the world's first bendable smartphone.

Samsung's reputation was dealt a blow by the bribery conviction of Lee Jae-yong -- the son and heir of the group's current chairman Lee Kun-hee.

Lee Jae-yong was a key figure in the scandal that ousted former South Korean leader Park Geun-hye following massive nationwide protests, and was sentenced to five years in jail last year.

But the sentence was reduced on appeal in February to a suspended jail term, and the 50-year-old scion was released after spending nearly a year in prison.

After his release, Lee joined South Korean President Moon Jae-in at the opening ceremony of a new Samsung Electronics $650 million smartphone plant in Noida, India, in July.